What is CVE-2021-44676?

CVE-2021-44676 is a critical-severity vulnerability in Zohocorp Manageengine Access Manager Plus, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-12-20.

How severe is CVE-2021-44676?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-44676 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Zohocorp Manageengine Access Manager Plus

CVE-2021-44676

Zoho ManageEngine Access Manager Plus before 4203 allows anyone to view a few data elements (e.g., access control details) and modify a few aspects of the application state.

Vulnerability class: Broken Authentication

Published 2021-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.044 (90.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: 0.000

Affected products

Zohocorp Manageengine Access Manager Plus — versions 4.1, 4.2

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

References

www.manageengine.com (Vendor Advisory)
pitstop.manageengine.com/portal/en/community/topic/security-advisory-authentica… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-44676?: CVE-2021-44676 is a critical-severity vulnerability in Zohocorp Manageengine Access Manager Plus, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-12-20.
How severe is CVE-2021-44676?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-44676 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.